
Steps:
Theme editor (Customize) > Add Section
Search Job list
Click Save
You can add Testimonials newsletter block

You can enter the Heading and Subheading, choose the design for the heading, also can choose text align: center.

With these options, you are allowed to set the Testimonial block design.

You can add Heading and Sub Heading.

Please follow this guideline to config Layout, Background, Margin/Padding for the section.